My dakota is a 3.9.....ok one day it starts running terrible like its not taking any gas and back fires a little when i try giving it gas to go. Had this problem once and replaced the upstream o2 sensor and it went away but the check engine light had never came on. Now the problem is back but worse and now i got a check engine light with both o2 sensor codes, replaced both of them twice and codes still come back and truck still runs like poorly, no change....please help, and I have to do this myself no money for shop. Thanks.
Sep 5, 2011 at 4:51 PM
